eltonhead



(No Model.)

W. B. ELTONHEAD.

GONDUIT FOR ELE-OTRIGAL GONDUGTORS. No. 269,568. Patented Dec. 26, 1882.

INVENTOR.

WITNESSES: AMM v W/ORNE}? UNITED STATES PATENT @rrrca.

WILLIAM B. ELTONHEAD, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO ED. Y. ELTONHEAD, OF SAME PLACE.

CONDUIT FOR ELECTRICAL CONDUCTORS.

SPECIFICATION forming part of Letters Patent No. 269,568, dated December 26, 1882. Application filed August 17, 1es1. x model.)

To all whom it may concern:

Beitknown that I, WILLIAMB. ELTONHEAD, of the city and county of Philadelphia, and State of Pennsylvania, have invented certain 5 new and useful Improvements in Conduits for Electrical Conductors, applicable to purposes of telegraphy, electric lighting, and the distribution of power; and I do hereby declare the following to be a sufficiently full, clear, and

exactdescriptionthereot'toenableothersskilled in the art to make and use the said invention.

The nature of my invention may be briefly stated to consist of a tube or trough formed of interlocking segments of non-conducting material united by clamps and bell joints or screw-joints, so as to be susceptible of being opened and closed at any point in its length; also, in a series of hangers combined with such segmental pipes, whereby the pipes may be readily erected and supported safely in tunnels, sewers, and upon buildings.

I will now proceed to particularly describe the mode of making and using the said invention, referring in so doing to the drawings annexed, and to letters of reference marked thereon.

Figure 1 shows an elevation of the apparatus; Fig. 1 shows an enlarged sectional view in vertical transverse section; Fig. 2, a verti- 0 cal transverse section with thehanger or clamp,

hereinafter described, applied; Fi .3, a longitudinal section of segments forming the outer shell or casing; Fig.4, avertical transverse section of two internal segments; Fig.5, alongitu- 5 dinal section of parts of segments of the conduit as assembled; Fig. 6, an elevation of the bell-joint uniting the external shell and the internal form thereof, indicated by dotted lines; and'Figs. 7 and 8 show in end and side eleva- 0 tion one of the clamping-hangers drawn on an enlarged scale.

The same letters of reference. apply to the same parts in the several figures.

A represents a tube formed of two or more ,45 concentric series of parallel staves or segments, B, having rabbets 0 formed in the ends, fitting with corresponding rabbets, E, upon the next segment, G, in length of that series, andwhen assembled this series of segments form an external shell or tube, marked J. (See Figs. 2, 4, and 5.) The several series of segments B and G are so assembled that the longitudinal seam of the inner segment, B, is covered by the central portion of the segment G, as shown in.Figs. 1, 1 2, and 4.. Thetransverse seams or joints of the segments Gr are so located in relation to the transverse seams of the inner segments, B, that seams of the latter are covered by the outer segments, as indicated in Fig. 5. The segments G of the outer series are provided at one end of each with a bell-shaped expansion having. annular grooves I therein, and the other end has corresponding rings or ridges, K, adapted to fit therein, so that when assembled the ridges K fit in the grooves I, as shown in Fig. 0. Hangers or divided clam ping-rings L, having a projecting tang or spur adapted to be inserted into the wall or arch of a culvert, as shown in Figs. 1 and 2, and which are made ol" enameled metal of such form as to be susceptible of opening and closing, as shown in Figs. 7 and 8, serve to support the casing G, and embrace the several segments forming the outer casing or shell, G, at the part where the bell of one section contains the smaller end of the next section, clamps the internallygrooved segments of the bell end upon the threads or convex annular ridges of the next section inclosed therein and holds them securely together, and thussimultaneouslysecures the closure of both the longitudinal and transverse joints of the sections embraced, and the hangers or clamps L, by reason of being divided and bolted together, so as to open and close, enable them to be readily applied and removed, and permit of ready access to any part of theelectrical conductor without disturbing any other considerable part of the casing.

The conductors may be insulated from each other in any of the usual modes; but I prefer to separate them by continuous grooved blocks of vitreous material, (marked N,) and to fill the interstices with anyt'nsible or plastic non'conductor, this mode permitting repairs of one conductor without seriously interrupting the use of the adjacent conductors. The whole furnishes an efficient means of protecting condoctors placed in underground passages, and at the same time secures the greatest facility ICD for inspection and repairs of one part without disturbing others.

The conduits and supports for the conductors are'made of vitrified earthenware, furn aceslag, glass, enameled metal, or other suitable non-conducting surface.

Having described my invention and the mode of making and using the same, what I claim as new and useful therein as originally of my intention is 1. A conduit for insulating; and protecting electrical conductors, consisting essentially of tubes formed in sections and segments of vitrified earthenware, enameled metal, or glass, with transverse grooves or threads adapted to interlock, and combined with the detachable clamping-hangers L, substantially as set forth.

2. In a conduit for electrical conductors, the combination, with a tube made in segments,

of segments located within the tube and provided with grooved peripheries t'orholdingthe wires, the innerand outersegments being composed of non-conducting material or conduct ing material coated with a non-conducting substance, substantially as set forth.

The combination, in an insulating-commit for electrical conductors, of tubular wire supports made in segmental sections of a nonconducting material, with a non-conducting inclosing tube, made also in segmental sections and united by clamping-hangers formed of metal and protected by enamel, substantially as and for the purpose set forth.

WM. B. ELTONHEAD.

Witnesses:

J. DANIEL EBY, P. A. NIoHoLsoN. 

